P0E7BCoolant Bypass Valve B Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P0E7B covers an interrupted control circuit of the second coolant bypass valve, B. The module sees no proper load on its output, so the valve cannot be positioned and stays wherever it last was or springs back to its rest position. Stellantis does use the valve B family: its 2025 and 2026 bulletins for the RAM 1500 and the Wagoneer with the 3.0 litre Hurricane engine list P0E7C to P0E7F together with U063C, a lost link to the valve B actuator, and its plug-in hybrids use P0E7F and P0E80. P0E7B itself appears in none of these published documents. Ford's 2019 hybrid summary shows the usual circuit test on a comparable valve, a driver fault lasting over 5 seconds. CARB requires circuit checks on such outputs. Short and plausibility faults are P0E7C to P0E7E.
- What you may notice
- Check engine light
- Heating or engine warm-up behaves differently
- Likely causes
- LikelyBroken wire or unplugged connector at valve B
- PossibleInternal open in the valve B actuator
- RareMissing supply or ground at a networked valve actuator
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.